Affiliation: | 1School of Civil Engineering, Univ. Estadual de Campinas, Caixa Postal 6021, 13083-852 Campinas, SP, Brazil (corresponding author). E-mail: jls@fec.unicamp.br 2Dept. of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, India; formerly, School of Civil Engineering, Univ. Politècnica de Catalunya, Barcelona, Spain. E-mail: gettu@iitm.ac.in
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